Saw-clamp.



T. B. WALKER.

SAW CLAMP.

APPLIUATION FILED 11.22, 1913.

1,1 19,908, Patented Dec.8,191 i 3 n ue/ntoz NURRIf; PEN-IRS CU" I'HOfOuruo wllmnuumm n 1 JOHN B. WALKER, OF PUNXSUTAWNEY, PENNSYLVANIA.

SAW-CLAMP.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed April 22, 1913. Serial No. 762,900.

To all whom it may concera Be it known that 1, JOHN B. VVALKER, acitizen of the United States, residing at Punxsutawney, in the county ofJefferson and State of Pennsylvania, have invented a new and usefulSaw-Clamp; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to a new and useful. improved saw clamp.

An object of the invention is to provide a saw clamp comprising astationary jaw and a movable jaw, one having a convex longitudinalsurface adapted to enter a concave longitudinal surface of the oppositejaw, and between which surfaces a saw to be sharpened is adapted to beclamped, in order to prevent vibration of the saw blade.

Another object of the invention is the provision of two correspondinglyshaped U-shaped members, to the ends of which bars are pivotallyconnected, one of said bars acting as a stationary clamping jaw, whilethe other bar constitutes a holder for the movable jaw. The holding barhaving guides for the movable jaw, in combination with a cam devicecoacting with a lug on an extension of the movable jaw, for operatingthe movable jaw toward and from the stationary jaw.

A feature of the invention is the provision of lateral lugs on theU-shaped members, through which the thumb screws are threaded providedwith swiveled plates, between which and lugs of the holding bar theboard of a bench is clamped. \Vhen the device is detached from the benchthe Ushaped members are folded, as shown.

The invention comprises further features and combinations of parts, ashereinafter set forth, shown in the drawings and claimed.

In the drawings ;--Figure 1 is a front view of the improved clamp,showing the same as applied to a bench. Fig. 2 is a plan view. Fig. 3 isa front edge view showing the U-shaped members folded, one partlyoverlapping the other. Fig. 4c is an end view of the saw clamp. Fig. 5is a sectional view on line 55 of Fig. 2. Fig. 6 is a detail view online 6-6 of Fig. 2 showing the pivotal connection of the U-shapedmembers in pockets of one of the jaws and the holding bar. Fig. 7 is adetail view, more thoroughly showing the cam for cooperating.

with said lug on the extension of the movable jaw for operating themovable jaw toward and from the stationary jaw.

deferring to the drawings, 1 designates a stationary jaw, having apocket 2 at each end, while 3 denotes a bar, likewise having a pocket ateach end. The bar 3 constitutes a holder for the movable jaw 5. Thepockets of the bar 3 are denoted by the numeral 1. The jaw l is providedwith a convex longitudinal surface 7, adapted to enter a con cavesurface or groove 8 of the jaw 5, that is, when the two aws are broughttogether without a saw blade thercbetween.

Substantially midway of the jaw 5, a lateral extension car 9 is providedupon the movable jaw. This laterally extending ear 9 is constructed witha slot 10, which re ceives the raised guide 11 of the bar 3, so as toguide the movable jaw toward and from the stationary jaw. Rising fromsaid extension car 9 at the end of said slot 10 is an elongated lug 12,with which the annular flange 13 of the cam 14 cooperates, whichtogether with the cam acting against the shoulder 14: of the movable jawcauses the movable jaw to move from and toward the stationary jaw. Thecam is held in position by the bolt 15, which passes through the raisedguide 11 of the bar 3 and is threaded therein, and locked in position bya lock nut 16.

Extending transversely of the pockets 2 and 41 of the movable jaw andthe bar 3 are pins 17 and 18, upon which the upper ends 19 of theU-shaped members 20 are pivoted. The U-shaped members 20 are providedwith laterally extending lugs21, through which the thumb screws 22 arethreaded. The upper ends of the thumb screws are provided with swiveledplates 23, between which and the lugs 2-1 the bench board 25 is clamped,thereby holding the saw clamp securely in position. When the saw clampis detached from the bench 25, the U-shaped members may be folded asshown in Fig. 3. In this manner the saw clamp may be arranged in acompact form, for shipment.

From the foregoing it is apparent that there has been devised a simpleand efficient saw clamp, and one which has been found practical anddesirable, owing to the detachi ability of the same and the folding ofthe a Q aliases parts into a compact compass, as Well as the vparticular manner of adjustment of the movable jaw, and also owing tothe provision of means for preventing the vibration of the saw bladeWhen clamped between the clamping jaws. V

The invention having been set forth, What is claimed as new and usefulis In a saw blade clamp, a stationary aw, a bar a movable jaw operableon the bar, means for operating and holding the movable aw in adjustedposition, the direct corresponding opposite ends of said bar and thestationary jaw having oppositely disposed pockets, U-shaped members, theends of each being pivoted in the opposite pock- &

ets of the bar and the stationary jaw, one side of each pocket beingopen to permit the ll-shaped members to close toward said jaws, theopposite closed side of each pocket acting to limit the outward movementof each U-shaped member, each U-shaped member having a lateral lug, andmeans carried by said lug for clamping a bench between said means and aportion of said bar.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

JOHN B. XVALKER.

' Witnesses:

J. W. SMIT E. E. Boss.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eatents,

Washington, I G.

